diff --git a/spacy/displacy/__init__.py b/spacy/displacy/__init__.py
index f11cb1881..f42dad0c9 100644
--- a/spacy/displacy/__init__.py
+++ b/spacy/displacy/__init__.py
@@ -130,7 +130,7 @@ def parse_deps(
 ) -> Dict[str, Any]:
     """Generate dependency parse in {'words': [], 'arcs': []} format.
 
-    orig_doc Union[Doc, Span]: Document to parse.
+    orig_doc (Union[Doc, Span]): Document to parse.
     options (Dict[str, Any]): Dependency parse specific visualisation options.
     RETURNS (dict): Generated dependency parse keyed by words and arcs.
     """